[Extensions] Add more bindings access checks

extensions/renderer/object_backed_native_handler.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/object_backed_native_handler.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "content/public/child/worker_thread.h"
+#include "extensions/common/extension_api.h"
 #include "extensions/renderer/console.h"
 #include "extensions/renderer/module_system.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_context_set.h"
 #include "extensions/renderer/v8_helpers.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 namespace {
@@ skipping 73 matching lines @@
     const std::string& name,
     const std::string& feature_name,
     const HandlerFunction& handler_function) {
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   v8::HandleScope handle_scope(isolate);
   v8::Context::Scope context_scope(context_->v8_context());
 
   v8::Local<v8::Object> data = v8::Object::New(isolate);
   SetPrivate(data, kHandlerFunction,
              v8::External::New(isolate, new HandlerFunction(handler_function)));
+  DCHECK(feature_name.empty() ||
+         ExtensionAPI::GetSharedInstance()->GetFeatureDependency(feature_name))
+      << feature_name;
   SetPrivate(data, kFeatureName,
              v8_helpers::ToV8StringUnsafe(isolate, feature_name));
   v8::Local<v8::FunctionTemplate> function_template =
       v8::FunctionTemplate::New(isolate, Router, data);
   v8::Local<v8::ObjectTemplate>::New(isolate, object_template_)
       ->Set(isolate, name.c_str(), function_template);
   router_data_.Append(data);
 }
 
 v8::Isolate* ObjectBackedNativeHandler::GetIsolate() const {
@@ skipping 66 matching lines @@
                                               v8::Local<v8::Object> obj,
                                               const char* key) {
   obj->DeletePrivate(context,
                      v8::Private::ForApi(
                          context->GetIsolate(),
                          v8::String::NewFromUtf8(context->GetIsolate(), key)))
       .FromJust();
 }
 
 }  // namespace extensions